987717 has 16 divisors (see below), whose sum is σ = 1415232. Its totient is φ = 610560.

The previous prime is 987713. The next prime is 987739. The reversal of 987717 is 717789.

It is a happy number.

It is not a de Polignac number, because 987717 - 2² = 987713 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5367 + ... + 5547.

It is an arithmetic number, because the mean of its divisors is an integer number (88452).

2⁹⁸⁷⁷¹⁷ is an apocalyptic number.

It is an amenable number.

987717 is a deficient number, since it is larger than the sum of its proper divisors (427515).

987717 is a wasteful number, since it uses less digits than its factorization.

987717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308.

The product of its digits is 24696, while the sum is 39.

The square root of 987717 is about 993.8395242694. The cubic root of 987717 is about 99.5888787763.

The spelling of 987717 in words is "nine hundred eighty-seven thousand, seven hundred seventeen".